Reductive dechlorination of trichloroethylene by iron bimetallics
Reductive dechlorination using a zero valence metal such as iron has seen an increase in interest with the extension of iron dechlorination to in-situ treatment of ground water. Studies to increase the rate of dechlorination and the long term stability have lead many to examine the use of bimetallic iron systems. Results are shown for bimetallic iron systems of Cu, Sn, Ni, Ag, Au, and Pd. All of these bimetallic couples form a galvanic couple which increase corrosion rates and the production of hydrogen. Increased rates of reaction normalized to surface area were observed for all the couples. The reaction rates were found to depended on surface area and surface coverage of the iron. The results of studies in deuterium oxide indicate that the pathways changed as the bimetallic is changed and that the pathway in all cases could be a combination of dehydrohalgenation and sequential dechlorination. Degradation of DNAPL TCE by iron was found to be zero order and the type of product observed was different from that observed for TCE dissolved in water.
- Research Organization:
- Monsanto Co., St. Louis, MO (US)
- OSTI ID:
- 20014878
- Resource Relation:
- Conference: 1998 National Conference on Environmental Engineering, Chicago, IL (US), 06/07/1998--06/10/1998; Other Information: PBD: 1998; Related Information: In: Water resources and the urban environment--98, by Wilson, T.E. [ed.], 754 pages.
- Country of Publication:
- United States
- Language:
- English
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